US4432331A - Engine control system - Google Patents

Engine control system Download PDF

Info

Publication number
US4432331A
US4432331A US06/390,687 US39068782A US4432331A US 4432331 A US4432331 A US 4432331A US 39068782 A US39068782 A US 39068782A US 4432331 A US4432331 A US 4432331A
Authority
US
United States
Prior art keywords
control system
wiper
engine control
reversible motor
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/390,687
Other languages
English (en)
Inventor
Seishi Yasuhara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Assigned to NISSAN MOTOR COMPANY, LIMITED, 2, TAKARA-CHO, KANAGAWA-KU, YOKOHAMA-SHI, KANAGAWA-KEN, reassignment NISSAN MOTOR COMPANY, LIMITED, 2, TAKARA-CHO, KANAGAWA-KU, YOKOHAMA-SHI, KANAGAWA-KEN, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: YASUHARA, SEISHI
Application granted granted Critical
Publication of US4432331A publication Critical patent/US4432331A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1406—Introducing closed-loop corrections characterised by the control or regulation method with use of a optimisation method, e.g. iteration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
    • F02D2041/0075—Estimating, calculating or determining the EGR rate, amount or flow by using flow sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • This invention relates to an engine control system responsive to engine operating parameters for determining a target value of setting of a controlled variable to obtain an optimum value of a condition for efffecting a predetermined function of an internal combustion engine and, more particularly, to such an engine control system having a feedback control circuit for correcting the target value for a deviation between the optimum and actual values.
  • microcomputers in engine control systems for more accurately controlling one or more functions of an internal combustion engine.
  • Such a microcomputer calculates target values of settings of controlled variables such as fuel-injection timing, EGR-valve position, ignition-system spark-timing, and the like and corrects each of the calculated target value for a correction factor corresponding to a deviation between the calculated target value and sensed actual value for the controlled variable.
  • the correction factors are stored in a computer memory such as a random access memory (RAM).
  • a target value is calculated to obtain an optimum EGR rate in relation to engine speed and engine load.
  • a correction factor is obtained in accordance with a deviation between the target EGR rate value and an actual EGR rate value sensed by a suitable sensor. It is necessary to store the correction factor in the computer memory or use just after the engine, which is stalled once, is restarted. However, the correction factor stored in the computer memory will be erased when the computer memory is separated from a source of power.
  • the present invention provides an engine control system having a memory which includes a potentiometer and a reversible motor drivingly connected to the potentiometer to tap off a resistance corresponding to a value to be stored in the memory.
  • a memory which includes a potentiometer and a reversible motor drivingly connected to the potentiometer to tap off a resistance corresponding to a value to be stored in the memory.
  • an engine control system responsive to engine operating parameters for determining a target value of setting of at least one controlled variable to obtain an optimum value of a condition for effecting a predetermined function of an internal combustion engine.
  • the engine control system includes a sensor associated with the engine for sensing an actual value of the condition, a comparator for detecting a difference between the actual value and the optimum value, a memory for storing a correction factor corresponding to the detected difference, and means for correcting the target value for the stored correction factor.
  • the memory includes a potentiometer having a resistor and a wiper movable in sliding contact with the resistor.
  • a reversible motor is drivingly connected to the wiper for moving the wiper on the resistor.
  • a motor dirve circuit is provided for rotating the reversible motor in one or reverse direction in accordance with the detected difference so as to permit the wiper to tap off a resistance corresponding to the detected difference.
  • the motor drive circuit rotates the reversible motor in one direction when the detected difference is positive and in the reverse direction when the detected difference is negative.
  • the motor drive circuit may be designed to rotate the reversible motor an angle corresponding to the detected difference.
  • the motor drive circuit may be constructed to rotate the reversible motor by a predetermined number of degrees at intervals.
  • FIG. 1 is a schematic block diagram showing one embodiment of an engine control system made in accordance with the present invention
  • FIG. 2 is a block diagram showing the motor drive circuit used in the engine control system of FIG. 1;
  • FIG. 3 is a sectional view showing the memory used in the engine control system of FIG. 1;
  • FIG. 4 includes two graphs used for explanation of the operation of the engine control system.
  • FIG. 5 is a block diagram showing an alarm circuit for use with the engine control system of the present invention.
  • FIG. 1 illustrates one embodiment of an engine control system made in accordance with the present invention. While in the examplification of the invention an EGR rate control circuit is illustrated, it is understood that the controlled variables, that is, the adjustable variables selected to control or determine the characteristics of the engine operation, may be fuel-injection timing, ignition-system spark-timing, and the like.
  • reference numeral 10 designates a computer which calculates a target value t of EGR rate in relation to engine operating parameters including engine speed N, engine load L, engine temperature T, barometric pressure P, and the like.
  • the computer 10 generates at its output a signal St corresponding to the calculated target value t.
  • the signal St is fed through a correcting circuit 12 to a control circuit 14.
  • the correction circuit 12 corrects the target value t for a correction factor K which is determined based upon a deviation between the target and actual EGR rate values caused by EGR system manufacturing and assembling errors, accumulated carbon in the EGR system, or the like.
  • the control circuit 14 controls the EGR rate, for example, by adjusting the position of an EGR valve incorporated in an internal combustion engine 16.
  • an EGR rate sensor 18 which senses the actual value a of EGR rate and generates at its output a signal Sa corresponding to the sensed actual EGR rate value a.
  • the signal Sa is applied to one input of a comparator 20 which also receives at another input the signal St from the computer 10.
  • the signal Sd has a positive sign when the difference d is larger than ⁇ and a negative sign when the difference d is smaller than - ⁇ , wherein ⁇ is a positive value including zero and is determined by the allowable error range for EGR rate control.
  • the magnitude of the signal SD is zero if the absolute value of the difference d is equal to or smaller than ⁇ .
  • the signal is then applied to a motor drive circuit 22 associated with a memory 24.
  • the memory 24 generates at its output a signal Sk indicative of a correction factor K corresponding to the difference d.
  • the signal Sk is applied to a converter 26 which converts the signal Sk into a corresponding signal for application to the correcting circuit 12.
  • the memory 24 includes a potentiometer 200 which comprises a resistor 202 and a wiper 204 for sliding movement on the resistor 202 to tap off a resistance corresponding to the position of the wiper 204.
  • the resistance 202 is connected at its opposite ends across a vehicle battery 214 through an engine key switch 212 so as to provide a voltage signal Sk corresponding to the tapped resistance between the ground and the wiper 204.
  • the potentiometer resistance 202 has a total resistance of 10K ⁇
  • the voltage signal Sk changes by 1 ⁇ V volts, wherein V is the voltage of the vehicle battery 214.
  • a 1K ⁇ change of the tapped resistance represents a change of the correction factor by a factor of 1.
  • the wiper 204 is drivingly connected to a reversible motor 206 rotatable in one and reverse directions to cause the sliding movement of the wiper 204 on the resistor 202.
  • the reversible motor 206 is driven by the motor drive circuit 22 which includes a reversing switch 208 connected to the reversible motor 206.
  • the revesing switch 208 is also connected to the vehicle battery 214 through a switch 210 and the engine key switch 212.
  • the reversing switch 208 has two positions for changing the polarity of the voltage applied across the reversible motor 206 to change the direction of rotation of the reversible motor 206.
  • the reversing switch 208 is associated with a sign detector 216 which detects the sign of polarity of the signal Sd from the comparator 20 and causes the reversing switch 208 to assure one of its positions in accordance with the detected sign.
  • the switch 210 is associated with a timer circuit 218 which detects the magnitude d of the signal Sd from the comparator 20 and closes the switch 210 for a time corresponding to the detected magnitude d of the signal Sd.
  • the reversible motor 206 has a motor housing 302 containing therein a solenoid coil 304 which is connected through lines 308 to the reversing switch 208 (FIG. 2) for rotating a motor drive shaft 306 in a forward or reverse direction when energized.
  • the rotation of the motor drive shaft 306 is transmitted to the potentiometer wiper 204 through a reduction gear unit 310 having a predetermined reduction gear ratio.
  • the reduction gear unit 310 includes a gear 312 mounted on the motor drive shaft 306.
  • the gear 312 meshes with a gear 314 secured on an auxiliary shaft 316 which has thereon another gear 318 meshing with a gear 320 secured on a wiper shaft 322 supported on the motor drive shaft 306 for free rotation thereon.
  • the wiper shaft 22 extends outwardly through a base plate 324 placed on the motor housing 302.
  • the wiper shaft 322 has thereon the wiper 204 in sliding contact with a semi-circular resistor 202 placed on the base plate 324.
  • Lines 326 connect the opposite ends of the semi-circular resistor 202 across the vehicle battery 214 through the engine key switch 214 and the potentiometer wiper 204 to the converter 26 (FIG. 1).
  • a cover 238 is placed on the base plate 324 to form a potentiometer chamber 330 containing therein the resistor 202 and the wiper 204.
  • the reduction geart unit 310 is effective to increase the torque to rotate the wiper shaft 322 and also to reduce the degree of rotation of the wiper shaft 222 for the same degree of rotation of the motor drive shaft 306. Assuming now that the reduction gear ratio is set at 1/30, every thirty degree of rotation of the motor drive shaft 306 causes the wiper shaft 322 to rotate one degree with a drive torque thirty times as great as that of the motor drive shaft 306. Thus, the reduction gear unit 310 permits the use of a small motor, such as for example, one used in wrist watches to drive the potentiometer wiper 204 and also fine control for the resistance of the potentiometer 200.
  • the comparator 20 provides a positive signal having a magnitude d corresponding to the deviation between the actual and target values.
  • the sign detector 216 places the reversing switch 208 in one position and the timer circuit 218 closes the switch 210 for a time corresponding to the absolute value of the magnitude d of the signal Sd so that the reversible motor 206 rotates in one direction causing the potentiometer wiper 204 to tap off an increased value of resistance.
  • the tapped resistance and thus the voltage signal Sk indicate a correction factor K corresponding to the deviation between the actual and target EGR rate values.
  • the comparator 20 When the sensed actual EGR rate value a is smaller than the calculated target EGR rate value t over the allowable error range ⁇ , the comparator 20 provides a negative signal having a magnitude d corresponding to the deviation between the actual and target EGR rate values. Te sign detector 216 changes the reversing switch 208 into another position and the timer circuit 218 closes the switch 210 for a time corresponding to the absolute value of the magnitude d of the signal Sd so that the reversible motor 206 rotates in another direction, causing the potentiometer wiper 204 to tap off a decreased value of resistance. If the deviation between the actual and target EGR ratio values is within the allowable error range, the comparator 20 provides no output. As a result, the reversible motor 206 remains stopped to maintain the tapped resistance and thus the signal Sk unchanged.
  • the motor drive circuit 22 may be designed to continuously rotates the reversible motor 206 in one or reverse direction until the signal Sd from the comparator 20 reaches zero if the condition to be controlled changes intermittently or its actual value can be sensed with high reliability. If the condition to be controlled changes with a relatively great dispersion and is difficult to be sensed with high reliability, it is preferable that the reversible motor 206 be a pulse motor and the motor drive circuit 22 be constructed to cause a small number of degrees, for example 30 degrees, of rotation of the reversible motor at a time so as to gradually bring the actual value close to the target value.
  • a control circuit 220 may be provided which generates, at uniform intervals, pulses having a constant pulse width through the timer circuit 218 or directly to the switch 210.
  • the operation will be described in relation to the motor drive circuit 22 adapted to rotate the reversible step motor 206 in one or reverse direction by a predetermined number of degrees at a time so as to gradually bring the actual value close to the target value.
  • EGR rate sensor 18 senses an EGR rate value greater than the calculated target value over the allowable error range ⁇ in the 1st step
  • the motor drive circuit 22 rotates the reversible motor 206 in one direction by a predetermined number of degrees to cause a predetermined amount ⁇ of reduction of the correction factor K. This operation is repeated in the 2nd, 3rd, 4th and 5th steps as long as the sensed EGR rate value is still greater than the calculated target EGR rate value over the allowable error range ⁇ .
  • the motor drive circuit 22 rotates the reversible motor 206 in the reverse direction by the predetermined number of degrees to cause the predetermined amount ⁇ of increase of the correction factor K. If, in the 7th step, the difference between the sensed and target EGR rate values is within the allowble error range, the motor drive circuit 22 does not rotate the reversible motor 206 so that the correction factor K is maintained at the same value as obtained in the previous step 6th.
  • the motor drive circuit 22 rotates the reversible motor 206 only by the predetermined number of degrees. If, in the 9th, 10th and 11th steps, the difference between the snesed and target EGR rate values is held within the allowable error range, the reversible motor 206 is maintained stopped and the correction factor K is maintained unchanged.
  • an alarm circuit 500 for providing an alarm when the correction factor K stored in the memory 24 is larger than an upper limit or smaller than a lower limit so as to indicate an abnormal condition in the EGR rate sensor, EGR-valve actuator, or other system components.
  • the alarm circuit 500 includes first and second comparators 502 and 504.
  • the first comparator 502 has an input connected to the potentiometer wiper 204 and another input connected to the potentiometer resistor 202 at a point P1 tapping off a resistance corresponding to the correction factor upper limit.
  • the first comparator 502 provides an alarm signal to one input of an OR circuit 506 when the wiper 204 moves upwardly in view of FIG. 5 over the point P1 or when the correctio factor K increases over the upper limit.
  • the second comparator 504 has an input connected to the potentiometer wiper 204 and another input connected to the potentiometer resistor 202 at a point P2 tapping off a resistance corresponding to the correction factor lower limit.
  • the second comparator 504 provides an alarm signal to another input of the OR circuit 506 when the wiper 204 moves downwardly in view of FIG. 5 over the point P2 or when the correction factor K decreases over the lower limit. Accordingly, an alarm signal is applied through the OR circuit 506 to a buzzer 508 which thereby operates to inform an abnormal condition in the EGR rate sensor, EGR-valve actuator, or other system components.
  • the another inputs of the first and second comparators 502 and 504 may be connected to the potentiometer resistor 202 at points tapping off 9K ⁇ and 1K ⁇ resistances, respectively.
  • an engine control system having a memory which includes a potentiometer and a reversible motor drivingly connected to the potentiometer for moving the potentiometer wiper to tap off a resistance corresponding to a value to be stored in the memory. Accordingly, the stored value can be maintained after the memory is separated from a source of power.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US06/390,687 1981-06-30 1982-06-21 Engine control system Expired - Lifetime US4432331A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP56101841A JPS585448A (ja) 1981-06-30 1981-06-30 自動車用電子制御装置のメモリ保存装置
JP56-101841 1981-06-30

Publications (1)

Publication Number Publication Date
US4432331A true US4432331A (en) 1984-02-21

Family

ID=14311280

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/390,687 Expired - Lifetime US4432331A (en) 1981-06-30 1982-06-21 Engine control system

Country Status (3)

Country Link
US (1) US4432331A (enrdf_load_stackoverflow)
JP (1) JPS585448A (enrdf_load_stackoverflow)
DE (1) DE3224310C2 (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674464A (en) * 1984-09-25 1987-06-23 Aisin Seiki Kabushiki Kaisha Electric exhaust gas recirculation valve
US4715348A (en) * 1985-08-31 1987-12-29 Nippondenso Co., Ltd. Self-diagnosis system for exhaust gas recirculation system of internal combustion engine
US4723528A (en) * 1986-02-28 1988-02-09 Fuji Jukogyo Kabushiki Kaisha Diagnosing system for an exhaust gas recirculation system of an automotive engine
US4773016A (en) * 1984-07-17 1988-09-20 Fuji Jukogyo Kabushiki Kaisha Learning control system and method for controlling an automotive engine
US4829440A (en) * 1984-07-13 1989-05-09 Fuji Jukogyo Kabushiki Kaisha Learning control system for controlling an automotive engine
US4834054A (en) * 1987-04-10 1989-05-30 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Method of detecting a fault of an exhaust gas recirculation system
US5016180A (en) * 1986-10-01 1991-05-14 Hitachi, Ltd. Tamper proof method and apparatus for adjusting a control parameter of a controlled apparatus
US6253748B1 (en) * 1998-05-09 2001-07-03 Robert Bosch Gmbh Method and device for controlling an internal combustion engine
US6401700B2 (en) * 1999-12-09 2002-06-11 International Engine Intellectual Property Company, L.L.C. Closed loop diesel engine EGR control including event monitoring
US6415776B1 (en) * 2000-08-25 2002-07-09 Ford Global Technologies, Inc. EGR system using pressure-based feedback control
US6564167B2 (en) * 1998-08-12 2003-05-13 Siemens Aktiengesellschaft Method of determining a position in dependence on a measurement signal of a position sensor
EP1394400A1 (en) * 2002-08-23 2004-03-03 Toyota Jidosha Kabushiki Kaisha Abnormality diagnosis device and abnormality diagnosis method for exhaust gas recirculation unit
US6827051B2 (en) * 1999-12-03 2004-12-07 Nissan Motor Co., Ltd. Internal EGR quantity estimation, cylinder intake air quantity calculation, valve timing control, and ignition timing control
US20050046425A1 (en) * 2003-08-28 2005-03-03 Pierburg Gmbh Potentiometer device for determination of valve positions
US20060207580A1 (en) * 2005-03-18 2006-09-21 Ken Hardman Electronic exhaust gas recirculation valve control
US20070175452A1 (en) * 2006-01-30 2007-08-02 Yanakiev Ognyan N Model-based inlet air dynamics state characterization
US20130158834A1 (en) * 2011-12-15 2013-06-20 Alexandre Wagner Method and device for ascertaining a modeling value for a physical variable in an engine system having an internal combustion engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343481A1 (de) * 1983-12-01 1985-06-13 Robert Bosch Gmbh, 7000 Stuttgart Korrektureinrichtung fuer ein kraftstoffzumesssystem einer brennkraftmaschine
JPS60256565A (ja) * 1984-05-31 1985-12-18 Mitsubishi Electric Corp 内燃機関の点火時期制御装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181944A (en) * 1977-07-15 1980-01-01 Hitachi, Ltd. Apparatus for engine control
US4257382A (en) * 1978-10-17 1981-03-24 Nippon Soken, Inc. Electronic control system for internal combustion engines
US4276866A (en) * 1978-12-06 1981-07-07 Nissan Motor Company, Limited Computer-controlled exhaust gas recirculation system for internal combustion engine
US4347570A (en) * 1978-12-18 1982-08-31 Nippondenso Co., Ltd. Method and apparatus for controlling ignition coil energization
US4385616A (en) * 1980-09-01 1983-05-31 Toyo Kogyo Co., Ltd. Air-fuel mixture control for automobile engine having fuel injection system
US4390001A (en) * 1980-10-20 1983-06-28 Toyo Kogyo Co., Ltd. Exhaust gas recirculation system for internal combustion engines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785356A (en) * 1971-11-15 1974-01-15 Arvin Ind Inc Electronically controlled ignition system
JPS4857022A (enrdf_load_stackoverflow) * 1971-11-18 1973-08-10
JPS6060019B2 (ja) * 1977-10-17 1985-12-27 株式会社日立製作所 エンジンの制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181944A (en) * 1977-07-15 1980-01-01 Hitachi, Ltd. Apparatus for engine control
US4257382A (en) * 1978-10-17 1981-03-24 Nippon Soken, Inc. Electronic control system for internal combustion engines
US4276866A (en) * 1978-12-06 1981-07-07 Nissan Motor Company, Limited Computer-controlled exhaust gas recirculation system for internal combustion engine
US4347570A (en) * 1978-12-18 1982-08-31 Nippondenso Co., Ltd. Method and apparatus for controlling ignition coil energization
US4385616A (en) * 1980-09-01 1983-05-31 Toyo Kogyo Co., Ltd. Air-fuel mixture control for automobile engine having fuel injection system
US4390001A (en) * 1980-10-20 1983-06-28 Toyo Kogyo Co., Ltd. Exhaust gas recirculation system for internal combustion engines

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829440A (en) * 1984-07-13 1989-05-09 Fuji Jukogyo Kabushiki Kaisha Learning control system for controlling an automotive engine
US4773016A (en) * 1984-07-17 1988-09-20 Fuji Jukogyo Kabushiki Kaisha Learning control system and method for controlling an automotive engine
US4674464A (en) * 1984-09-25 1987-06-23 Aisin Seiki Kabushiki Kaisha Electric exhaust gas recirculation valve
US4715348A (en) * 1985-08-31 1987-12-29 Nippondenso Co., Ltd. Self-diagnosis system for exhaust gas recirculation system of internal combustion engine
US4723528A (en) * 1986-02-28 1988-02-09 Fuji Jukogyo Kabushiki Kaisha Diagnosing system for an exhaust gas recirculation system of an automotive engine
US5016180A (en) * 1986-10-01 1991-05-14 Hitachi, Ltd. Tamper proof method and apparatus for adjusting a control parameter of a controlled apparatus
US4834054A (en) * 1987-04-10 1989-05-30 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Method of detecting a fault of an exhaust gas recirculation system
US6253748B1 (en) * 1998-05-09 2001-07-03 Robert Bosch Gmbh Method and device for controlling an internal combustion engine
US6564167B2 (en) * 1998-08-12 2003-05-13 Siemens Aktiengesellschaft Method of determining a position in dependence on a measurement signal of a position sensor
US6827051B2 (en) * 1999-12-03 2004-12-07 Nissan Motor Co., Ltd. Internal EGR quantity estimation, cylinder intake air quantity calculation, valve timing control, and ignition timing control
US6401700B2 (en) * 1999-12-09 2002-06-11 International Engine Intellectual Property Company, L.L.C. Closed loop diesel engine EGR control including event monitoring
US6415776B1 (en) * 2000-08-25 2002-07-09 Ford Global Technologies, Inc. EGR system using pressure-based feedback control
EP1394400A1 (en) * 2002-08-23 2004-03-03 Toyota Jidosha Kabushiki Kaisha Abnormality diagnosis device and abnormality diagnosis method for exhaust gas recirculation unit
US20050046425A1 (en) * 2003-08-28 2005-03-03 Pierburg Gmbh Potentiometer device for determination of valve positions
US6990967B2 (en) * 2003-08-28 2006-01-31 Pierburg Gmbh Potentiometer device for determination of valve positions
US20060207580A1 (en) * 2005-03-18 2006-09-21 Ken Hardman Electronic exhaust gas recirculation valve control
US7124751B2 (en) * 2005-03-18 2006-10-24 Daimlerchrysler Corporation Electronic exhaust gas recirculation valve control
US20070175452A1 (en) * 2006-01-30 2007-08-02 Yanakiev Ognyan N Model-based inlet air dynamics state characterization
US7321820B2 (en) * 2006-01-30 2008-01-22 Gm Global Technology Operations, Inc. Model-based inlet air dynamics state characterization
US20130158834A1 (en) * 2011-12-15 2013-06-20 Alexandre Wagner Method and device for ascertaining a modeling value for a physical variable in an engine system having an internal combustion engine
US9309826B2 (en) * 2011-12-15 2016-04-12 Robert Bosch Gmbh Method and device for ascertaining a modeling value for a physical variable in an engine system having an internal combustion engine

Also Published As

Publication number Publication date
DE3224310C2 (de) 1986-05-28
JPS585448A (ja) 1983-01-12
JPS6328232B2 (enrdf_load_stackoverflow) 1988-06-07
DE3224310A1 (de) 1983-01-13

Similar Documents

Publication Publication Date Title
US4432331A (en) Engine control system
US7240665B2 (en) Method and apparatus for controlling motor-driven throttle valve, automobile, method of measuring temperature of motor for driving automotive throttle valve, and method of measuring motor temperature
EP0024645B1 (en) Method and apparatus for controlling the operation of a pump
US5617337A (en) Method and device for monitoring sensor functions
US7239097B2 (en) Vehicle-mounted drive control apparatus
US7603980B2 (en) Sensor abnormality detecting method and electronic throttle control apparatus
US4425889A (en) Electric governor for internal combustion engine
US20050192142A1 (en) Active tensioner
US7337758B2 (en) Charge motion control valve actuator
EP0640769A1 (en) Automatic warming-up apparatus and method thereof in hydraulic systems
US7522984B2 (en) Method and system for determining the point of engagement of a clutch operable via an actuating device
US5705907A (en) Drive control system for servo motor
JPH08238938A (ja) 自動車の閉鎖部材の駆動装置
US4393842A (en) Air/fuel ratio control system for internal combustion engines, having atmospheric pressure compensating function
JP2715227B2 (ja) 冷蔵庫用ダンパーの停止検出方法
US5388401A (en) System and method for controlling air/fuel mixture ratio for internal combustion engine with exhaust secondary air supply apparatus
JP3463463B2 (ja) センサの異常診断装置
EP0536676B1 (en) Electronic fuel-injection device having read/write memory for storing actuator correction value
US4649880A (en) Apparatus for throttle valve control
US6304048B1 (en) Method and device for determining torque in an automotive power window system
JPH0154535B2 (enrdf_load_stackoverflow)
JP3889821B2 (ja) 自動車搭載調整装置の終位置検出方法及び装置
US5983155A (en) Method and arrangement for controlling an internal combustion engine
JPH07317590A (ja) 調整操作部材の機能を診断するための方法
US5419186A (en) Method and arrangement for checking the operation of an actuator in a motor vehicle

Legal Events

Date Code Title Description
AS Assignment

Owner name: NISSAN MOTOR COMPANY, LIMITED, 2, TAKARA-CHO, KANA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YASUHARA, SEISHI;REEL/FRAME:004019/0179

Effective date: 19820511

Owner name: NISSAN MOTOR COMPANY, LIMITED, 2, TAKARA-CHO, KANA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YASUHARA, SEISHI;REEL/FRAME:004019/0179

Effective date: 19820511

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M170); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M171); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M185); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12